Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period
Ice cores from central Greenland are the temporally best resolved records of northern hemisphere climate of the last glacial period. Here we show that during the last glacial period (MIS 4 to MIS 2) East Asian Monsoon variations are directly recorded in the North-GRIP ice core (north-central Greenla...
Main Authors: | , , , , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2005
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/12149/ https://hdl.handle.net/10013/epic.22582 |
id |
ftawi:oai:epic.awi.de:12149 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:12149 2023-09-05T13:19:52+02:00 Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period Ruth, Urs Roethlisberger, R. Bigler, M. Siggaard-Andersen, M. L. Kipfstuhl, Sepp Steffensen, J. P. Johnsen, S. Hansson, M. Goto-Azuma, K. 2005 https://epic.awi.de/id/eprint/12149/ https://hdl.handle.net/10013/epic.22582 unknown Ruth, U. , Roethlisberger, R. , Bigler, M. , Siggaard-Andersen, M. L. , Kipfstuhl, S. , Steffensen, J. P. , Johnsen, S. , Hansson, M. and Goto-Azuma, K. (2005) Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period , General Assembly of the European Geosciences Union, 24.-29.04.2005 Vienna, Austria. . hdl:10013/epic.22582 EPIC3General Assembly of the European Geosciences Union, 24.-29.04.2005 Vienna, Austria. Conference notRev 2005 ftawi 2023-08-22T19:49:44Z Ice cores from central Greenland are the temporally best resolved records of northern hemisphere climate of the last glacial period. Here we show that during the last glacial period (MIS 4 to MIS 2) East Asian Monsoon variations are directly recorded in the North-GRIP ice core (north-central Greenland). The East Asian Winter Monsoon (EAWM) strength as inferred from Chinese loess deposits correlates well with the concentration and size distribution of insoluble mineral particles in the North-GRIP core, and we infer that the ice core microparticle record can be taken as a proxy for EAWM. Further, reconstructions of the Indian Summer Monsoon (ISM) strength, which controls the transport of moisture into the source regions, correlate well with the CaCO3 content at North-GRIP: e.g. the early onset of ISM after approx. 18 ka BP and the depression during MIS4, which have been inferred from East Asian loess-paleosol sequences, are also seen at NGRIP. These findings yield a new basis for ice core interpretation and put tighter constrains on the dating of Chinese loess-paleosol sequences. Finally, we take d18O as a proxy for North Atlantic temperature (NAT) and compare the timing of NAT, EAWM and ISM changes at rapid climatic transitions during the last glacial period; this can be done with high accuracy because all proxies are from the same archive and do not underlie relative dating uncertainties. We find that at rapid cold-to-warm transitions during the last glacial period EAWM changes synchronously with NAT, while ISM lags by approx. 45 years. Apart from the climatological implications this may become important for high-precision cross-dating records of NAT with East Asian records of Summer Monsoon strength such as speleothems. Conference Object Greenland GRIP ice core NGRIP North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland Indian |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Ice cores from central Greenland are the temporally best resolved records of northern hemisphere climate of the last glacial period. Here we show that during the last glacial period (MIS 4 to MIS 2) East Asian Monsoon variations are directly recorded in the North-GRIP ice core (north-central Greenland). The East Asian Winter Monsoon (EAWM) strength as inferred from Chinese loess deposits correlates well with the concentration and size distribution of insoluble mineral particles in the North-GRIP core, and we infer that the ice core microparticle record can be taken as a proxy for EAWM. Further, reconstructions of the Indian Summer Monsoon (ISM) strength, which controls the transport of moisture into the source regions, correlate well with the CaCO3 content at North-GRIP: e.g. the early onset of ISM after approx. 18 ka BP and the depression during MIS4, which have been inferred from East Asian loess-paleosol sequences, are also seen at NGRIP. These findings yield a new basis for ice core interpretation and put tighter constrains on the dating of Chinese loess-paleosol sequences. Finally, we take d18O as a proxy for North Atlantic temperature (NAT) and compare the timing of NAT, EAWM and ISM changes at rapid climatic transitions during the last glacial period; this can be done with high accuracy because all proxies are from the same archive and do not underlie relative dating uncertainties. We find that at rapid cold-to-warm transitions during the last glacial period EAWM changes synchronously with NAT, while ISM lags by approx. 45 years. Apart from the climatological implications this may become important for high-precision cross-dating records of NAT with East Asian records of Summer Monsoon strength such as speleothems. |
format |
Conference Object |
author |
Ruth, Urs Roethlisberger, R. Bigler, M. Siggaard-Andersen, M. L. Kipfstuhl, Sepp Steffensen, J. P. Johnsen, S. Hansson, M. Goto-Azuma, K. |
spellingShingle |
Ruth, Urs Roethlisberger, R. Bigler, M. Siggaard-Andersen, M. L. Kipfstuhl, Sepp Steffensen, J. P. Johnsen, S. Hansson, M. Goto-Azuma, K. Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period |
author_facet |
Ruth, Urs Roethlisberger, R. Bigler, M. Siggaard-Andersen, M. L. Kipfstuhl, Sepp Steffensen, J. P. Johnsen, S. Hansson, M. Goto-Azuma, K. |
author_sort |
Ruth, Urs |
title |
Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period |
title_short |
Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period |
title_full |
Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period |
title_fullStr |
Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period |
title_full_unstemmed |
Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period |
title_sort |
ice core evidence on east asian and indian monsoon variations during the last glacial period |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/12149/ https://hdl.handle.net/10013/epic.22582 |
geographic |
Greenland Indian |
geographic_facet |
Greenland Indian |
genre |
Greenland GRIP ice core NGRIP North Atlantic |
genre_facet |
Greenland GRIP ice core NGRIP North Atlantic |
op_source |
EPIC3General Assembly of the European Geosciences Union, 24.-29.04.2005 Vienna, Austria. |
op_relation |
Ruth, U. , Roethlisberger, R. , Bigler, M. , Siggaard-Andersen, M. L. , Kipfstuhl, S. , Steffensen, J. P. , Johnsen, S. , Hansson, M. and Goto-Azuma, K. (2005) Ice core evidence on East Asian and Indian Monsoon variations during the last glacial period , General Assembly of the European Geosciences Union, 24.-29.04.2005 Vienna, Austria. . hdl:10013/epic.22582 |
_version_ |
1776200654730035200 |